Roof unit with protective structure

Abstract

The invention relates to the technical field of air conditioning equipment, and discloses a roof unit with a protective structure, which comprises a shell, a conveying assembly is fixedly mounted at the bottom end of an inner cavity of the shell, a cleaning assembly and an air exhaust assembly are arranged in the middle of the inner cavity of the shell, and a closing assembly is arranged in an inner cavity of the conveying assembly. A motor drives a second screw rod to rotate, a banister brush can be driven to move leftwards to wipe off dust attached to a condenser, a first screw rod is driven to rotate through a steering bevel gear set and a transmission belt while the second screw rod rotates, the first screw rod drives a moving plate to move downwards, and after a closing assembly is opened, air is supplied into a fixing box through an air suction pipe; dust wiped off is sucked into the fixing box through the exhaust pipe, automatic cleaning of dust on the condenser is achieved, and therefore the heat exchange effect of the condenser is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and more particularly to a rooftop machine with a protective structure. Background Art

[0002] Rooftop units are large and medium-sized integrated air-conditioning equipment with their own cooling source and air cooling. They are widely used in commercial buildings, industrial plants, hospitals, schools and other places.

[0003] The Chinese invention with application number 201710340090.2 discloses a rooftop air conditioner, which records that when the electric auxiliary heating device needs to be inspected and cleaned, the air supply duct needs to be disassembled from the air supply port first, and then the electric auxiliary heating device is disassembled through the air supply port for inspection and cleaning. After the inspection and cleaning work is completed, the air supply duct is installed to the air supply port. In the above-mentioned air conditioner, the electric auxiliary heating device is troublesome to disassemble and assemble, which greatly affects the inspection efficiency of the rooftop air conditioner. At the same time, repeated disassembly of the air supply duct will reduce the reliability of the air supply duct connection. At the same time, in actual use, there is also a problem that, since the outside of the condenser of the rooftop machine is directly protected by a large-aperture grid, dust will accumulate on the surface of the condenser after long-term use, thereby affecting the heat exchange efficiency of the condenser. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a rooftop unit with a protective structure, which has the advantage of improving heat exchange efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a rooftop machine with a protective structure, comprising a casing, a conveying assembly is fixedly installed at the bottom end of the inner cavity of the casing, a cleaning assembly and an exhaust assembly are arranged in the middle of the inner cavity of the casing, and a closing assembly is arranged in the inner cavity of the conveying assembly; The conveying assembly includes a fixed box, which is fixedly installed at the bottom end of the inner cavity of the casing, and a connecting pipe and an exhaust pipe are fixedly installed at the top of the fixed box. The inner cavity of the fixed box is rotatably connected to a screw rod 1, and a movable plate is meshed on the surface of the screw rod 1; The cleaning assembly includes a motor, which is fixedly installed on the front side of the middle part of the inner cavity of the casing. The output shaft of the motor is fixedly sleeved with a screw rod 2, and the surface of the screw rod 2 is meshed with an engaging plate. A soft brush is fixedly installed on the top of the engaging plate. A steering bevel gear set is provided at one end of the screw rod 2 close to the fixed box.

[0006] As a preferred technical solution of the present invention, the conveying assembly also includes a transmission wheel and a transmission belt. The transmission wheel is fixedly mounted on the bottom end of the steering bevel gear set and screw one, the transmission belt is connected to the surface of the transmission wheel, and the bottom end of the exhaust pipe passes through the bottom of the casing.

[0007] As a preferred technical solution of the present invention, the exhaust assembly includes a fixed tube, which is fixedly installed on the front side of the middle part of the inner cavity of the casing, a rotating tube is provided at the top end of the fixed tube, and an exhaust tube is fixedly installed on the rear side of the rotating tube.

[0008] As a preferred technical solution of the present invention, the soft brush is located at the rear side of the exhaust pipe, and the fixed pipe has no contact with the motor and the meshing plate.

[0009] As a preferred technical solution of the present invention, the closing component includes a closing plate, which is rotatably connected to the top of the inner cavity of the fixed box, an extension plate is fixedly installed on the bottom end of the closing plate, a return spring is fixedly installed between the extension plate and the front side wall of the inner cavity of the connecting pipe, the closing plate is located below the connecting pipe, and the exhaust pipe is located on the side of the connecting pipe close to the motor.

[0010] As a preferred technical solution of the present invention, the casing is provided with original machine accessories, and the original machine accessories include a fan, a rain cover, a condenser and a mounting bracket. The fan and the rain cover are both fixedly mounted on the top of the casing, the fan is located in the rain cover, the condenser is fixedly mounted in the inner cavity of the casing, and the mounting bracket is fixedly mounted on the bottom of the casing.

[0011] As a preferred technical solution of the present invention, a fastening assembly is fixedly installed on the bottom end of the mounting frame, and the fastening assembly includes an air box, the inner cavity of the air box is movably connected with a movable shaft, the end of the movable shaft extending out of the air box is fixedly installed with a rack, the end of the air box away from the air box is fixedly installed with a one-way air outlet pipe and a pressure relief valve, and the top of the movable plate is fixedly installed with a one-way air inlet pipe.

[0012] As a preferred technical solution of the present invention, the top end of the one-way air outlet pipe passes through the bottom of the casing and is fixedly installed at the bottom end of the inner cavity of the fixed box, the bottom end of the one-way air inlet pipe does not contact the casing, and the pressure relief valve is located on the side of the one-way air outlet pipe away from the casing.

[0013] As a preferred technical solution of the present invention, a rotating assembly is fixedly installed on the bottom end of the casing, and the rotating assembly includes a fixed plate, a telescopic rod is fixedly installed on the bottom end of the fixed plate, and a hexagonal sleeve is rotatably connected to the bottom end of the telescopic rod, and a gear ring 1 is fixedly installed on the outer side of the bottom end of the hexagonal sleeve, and the gear ring 1 is meshed with a rack 1.

[0014] As a preferred technical solution of the present invention, a shielding assembly is provided in the middle portion of the casing, and the shielding assembly includes a cylinder, which is fixedly mounted on the left side of the inner wall of the casing, and the output end of the cylinder is fixedly sleeved with a second rack, and the bottom end of the rotating tube is fixedly mounted with a second gear ring, and the bottom end of the second gear ring is fixedly mounted with a connecting ring, and the connecting ring is rotatably connected to the top of the fixed tube, a closing plate is fixedly mounted on the right side of the exhaust pipe, and a protective net is fixedly mounted on the front side of the casing, and an auxiliary air intake pipe is rotatably connected to the right side of the casing, and the bottom end of the auxiliary air intake pipe is in contact with the second rack.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the rotation of screw two by a motor, which can drive the soft brush to move left and wipe off the dust attached to the condenser. The screw two drives the screw one to rotate through the steering bevel gear set and the transmission belt while rotating, so that the screw one drives the movable plate to move downward, and after the closing component is opened, air is sent into the fixed box through the exhaust pipe, so that the wiped dust is sucked into the fixed box through the exhaust pipe, so that the dust on the condenser is automatically cleaned, and in the process of the movable plate moving downward, the gas under the movable plate can be squeezed into the gas box. If the fixing bolts on the mounting frame are loose, the moving shaft can be pushed to move by the gas, so that the rack one drives the gear ring one and the hexagonal socket to rotate and tighten the fixing bolts again. When it rains, the rack two is driven to move by the cylinder, and the gear ring two and the rotating tube are driven to rotate, so that the closing plate is covered on the protective net, and the rack two pushes open the bottom end of the auxiliary air inlet pipe, and air is taken in through the bottom of the auxiliary air inlet pipe, so as to prevent rainwater from entering the device and increase the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the structural casing of the present invention; Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 It is a cross-sectional schematic diagram of the structural conveying assembly of the present invention; Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point B in the middle; Figure 6 This is a schematic diagram of the connection of the cleaning components of the structure of the present invention; Figure 7 For the present invention Figure 6 The enlarged schematic diagram at C in the middle; Figure 8 This is a schematic diagram of the one-way air intake pipe connection structure of the present invention; Fig. 9 For the present invention Figure 8 Enlarged schematic diagram at point D in the middle.

[0017] In the figure: 1, housing; 2, conveying assembly; 21, fixing box; 22, connecting pipe; 23, screw rod 1; 24, transmission wheel; 25, transmission belt; 26, moving plate; 27, exhaust pipe; 3, cleaning assembly; 31, motor; 32, screw rod 2; 33, meshing plate; 34, soft brush; 35, steering bevel gear set; 4, exhaust assembly; 41, fixing pipe; 42, rotating pipe; 43, exhaust pipe; 5, closing assembly; 51, closing plate; 52, extension plate; 53, return spring; 6, fastening assembly; 61. Air box; 62. Moving shaft; 63. One-way air outlet pipe; 64. Rack 1; 65. One-way air inlet pipe; 66. Pressure relief valve; 7. Rotating assembly; 71. Fixed plate; 72. Telescopic rod; 73. Hexagon socket; 74. Gear ring 1; 8. Shielding assembly; 81. Cylinder; 82. Rack 2; 83. Gear ring 2; 84. Connecting ring; 85. Closing plate; 86. Protective net; 87. Auxiliary air inlet pipe; 9. Original machine accessories; 91. Fan; 92. Rain cover; 93. Condenser; 94. Mounting bracket. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] like Figures 1 to 4 , Figures 6 to 9 As shown, the present invention provides a rooftop machine with a protective structure, comprising a casing 1, a conveying assembly 2 is fixedly installed at the bottom end of the inner cavity of the casing 1, a cleaning assembly 3 and an exhaust assembly 4 are arranged in the middle of the inner cavity of the casing 1, and a closing assembly 5 is arranged in the inner cavity of the conveying assembly 2; The conveying assembly 2 includes a fixed box 21, which is fixedly mounted at the bottom end of the inner cavity of the casing 1, and a connecting pipe 22 and an exhaust pipe 27 are fixedly mounted at the top of the fixed box 21. The inner cavity of the fixed box 21 is rotatably connected to a screw rod 23, and a movable plate 26 is meshed on the surface of the screw rod 23; the conveying assembly 2 also includes a transmission wheel 24 and a transmission belt 25, the transmission wheel 24 is fixedly mounted on the steering bevel gear set 35 and the bottom end of the screw rod 23, the transmission belt 25 is transmission-connected to the surface of the transmission wheel 24, and the bottom end of the exhaust pipe 27 passes through the bottom of the casing 1; The cleaning assembly 3 includes a motor 31, which is fixedly mounted on the front side of the middle of the inner cavity of the housing 1. The output shaft of the motor 31 is fixedly sleeved with a screw rod 32, the surface of the screw rod 32 is meshed with a meshing plate 33, the top of the meshing plate 33 is fixedly mounted with a soft brush 34, and the end of the screw rod 32 close to the fixed box 21 is provided with a steering bevel gear set 35; The air extraction assembly 4 includes a fixed pipe 41, which is fixedly mounted on the front side of the middle part of the inner cavity of the housing 1, a rotating pipe 42 is provided at the top of the fixed pipe 41, an air extraction pipe 43 is fixedly mounted on the rear side of the rotating pipe 42, a soft brush 34 is located on the rear side of the air extraction pipe 43, and the fixed pipe 41 has no contact with the motor 31 and the meshing plate 33; The closing assembly 5 includes a closing plate 51, which is rotatably connected to the top of the inner cavity of the fixing box 21, and an extension plate 52 is fixedly installed at the bottom end of the closing plate 51. A return spring 53 is fixedly installed between the extension plate 52 and the front side wall of the inner cavity of the connecting pipe 22. The closing plate 51 is located below the connecting pipe 22, and the exhaust pipe 27 is located on the side of the connecting pipe 22 close to the motor 31. The casing 1 is provided with original machine accessories 9, which include a fan 91, a rain cover 92, a condenser 93 and a mounting bracket 94. The fan 91 and the rain cover 92 are both fixedly mounted on the top of the casing 1, the fan 91 is located in the rain cover 92, the condenser 93 is fixedly mounted in the inner cavity of the casing 1, and the mounting bracket 94 is fixedly mounted on the bottom of the casing 1.

[0020] The working principle and beneficial effects of the above technical solution are: When the starting device is working, the motor 31 is started once, and the meshing plate 33 is driven to move away from the motor 31 by driving the rotation of the screw rod 2 32, so that the soft brush 34 is moved to the position of the auxiliary air intake pipe 87. In this process, the screw rod 2 32 drives the screw rod 1 23 to rotate through the steering bevel gear set 35, the transmission wheel 24 and the transmission belt 25, so that the movable plate 26 meshed on the screw rod 1 23 moves upward. During the upward movement, since the closing component 5 is closed, the gas above the movable plate 26 is discharged through the exhaust pipe 27. When the movable plate 26 moves to the upper dead center, the motor 31 stops. The upper dead center of the movable plate 26 is three centimeters below the extension plate 52. After the device is stopped, the motor 31 is started again, and the motor 31 Drive screw rod 2 32 to rotate in the opposite direction and pull the soft brush 34 back to the motor 31. During this process, the soft brush 34 can wipe off the dust attached to the condenser 93 by contacting with the condenser 93, and the movable plate 26 will move downward in screw rod 1 23. At this time, the upper part of the movable plate 26 is in a negative pressure state, so that the closing plate 51 rotates downward to open the bottom end of the connecting pipe 22. At this time, the outside air is drawn into the fixed box 21 through the exhaust pipe 43, the rotating pipe 42 and the connecting pipe 22. When the soft brush 34 moves to the position of the motor 31, the motor 31 stops, so that the dust on the surface of the condenser 93 is automatically cleaned after the device stops working, so as to avoid dust blocking the condenser 93 and improve the heat exchange efficiency of the device. Example

[0021] like Figures 1 to 8 As shown, the present invention provides a roof machine with a protective structure, a fastening assembly 6 is fixedly installed at the bottom end of the mounting frame 94, the fastening assembly 6 includes an air box 61, the inner cavity of the air box 61 is movably connected with a moving shaft 62, a rack 64 is fixedly installed at one end of the moving shaft 62 extending out of the air box 61, a one-way air outlet pipe 63 and a pressure relief valve 66 are fixedly installed at one end of the air box 61 away from the air box 61, and a one-way air inlet pipe 65 is fixedly installed at the top end of the moving plate 26; The top of the one-way air outlet pipe 63 passes through the bottom of the housing 1 and is fixedly mounted at the bottom of the inner cavity of the fixing box 21. The bottom of the one-way air inlet pipe 65 does not contact the housing 1. The pressure relief valve 66 is located on the side of the one-way air outlet pipe 63 away from the housing 1. A rotating assembly 7 is fixedly installed at the bottom end of the casing 1, and the rotating assembly 7 includes a fixed plate 71. A telescopic rod 72 is fixedly installed at the bottom end of the fixed plate 71. The bottom end of the telescopic rod 72 is rotatably connected to a hexagonal sleeve 73. A gear ring 74 is fixedly installed on the outer side of the bottom end of the hexagonal sleeve 73, and the gear ring 74 is meshed with a rack 64.

[0022] The working principle and beneficial effects of the above technical solution are: When the movable plate 26 moves upward, the outside air can be drawn into the fixed box 21 through the one-way air inlet pipe 65. When the movable plate 26 moves downward, the movable plate 26 can squeeze the air below the movable plate 26 into the air box 61 through the one-way air outlet pipe 63. At this time, if the fixing bolts of the mounting frame 94 are loose, the gas entering the air box 61 can push the movable shaft 62 to move, thereby driving the gear ring 1 74 to rotate, driving the hexagon socket 73 and the fixing bolts in the hexagon socket 73 to rotate and retighten. When the fastening bolts are tightened, the hexagon socket 73 cannot continue to rotate. At this time, the rack 1 64 is stuck by the gear ring 1 74 and cannot move. As the air continues to enter the air box 61, when the pressure in the air box 61 reaches the pressure relief valve When the opening pressure of the pressure relief valve 66 is reached, the pressure is released directly through the pressure relief valve 66; if the fixing bolts of the mounting bracket 94 are not loose, the rack 64 will be directly stuck by the gear ring 74 and cannot move, and air will continuously enter the air box 61. When the pressure in the air box 61 reaches the opening pressure of the pressure relief valve 66, the pressure is released directly through the pressure relief valve 66, so that the fixing bolts of the device can be reinforced and tightened every time the device is shut down, so as to avoid the loosening of the fixing bolts on the mounting bracket 94 due to the long-term operation of the device. The setting of the telescopic rod 72 allows the hexagonal socket 73 to move up and down. When installing the device, the hexagonal socket 73 can be pulled up as a whole to leak out of the mounting hole of the mounting bracket 94, and then the fixing bolts can be put into the mounting hole and tightened. Example

[0023] like Figures 1 to 7 As shown, the present invention provides a rooftop machine with a protective structure, a shielding assembly 8 is provided in the middle of a casing 1, the shielding assembly 8 comprises a cylinder 81, the cylinder 81 is fixedly mounted on the left side of the inner wall of the casing 1, a rack 2 82 is fixedly sleeved on the output end of the cylinder 81, a gear ring 2 83 is fixedly mounted on the bottom end of a rotating tube 42, a connecting ring 84 is fixedly mounted on the bottom end of the gear ring 2 83, the connecting ring 84 is rotatably connected to the top end of the fixed tube 41, a closing plate 85 is fixedly mounted on the right side of the exhaust pipe 43, a protective net 86 is fixedly mounted on the front side of the casing 1, an auxiliary air intake pipe 87 is rotatably connected to the right side of the casing 1, and the bottom end of the auxiliary air intake pipe 87 contacts with the rack 2 82.

[0024] The working principle and beneficial effects of the above technical solution are: In rainy weather, the cylinder 81 can be started separately to drive the rack 2 82 to move. Through the meshing of the rack 2 82 and the gear ring 2 83, the rotating tube 42 can be driven to rotate, so that the closing plate 85 rotates toward the protective net 86. When the closing plate 85 contacts the protective net 86, the mesh on the protective net 86 can be completely blocked. In the process of the movement of the rack 2 82, the rack 2 82 pushes out the bottom end of the auxiliary air intake pipe 87, so that the auxiliary air intake pipe 87 is tilted as a whole, so that the air inlet at the bottom end of the auxiliary air intake pipe 87 is located on the outside of the casing 1. At this time, the device takes in air through the air inlet at the bottom end of the auxiliary air intake pipe 87, which prevents rainwater from entering the inside of the device and improves the service life of the device.

[0025] The working principle and use process of the present invention: When the device is started, the fan 91 drives the air to flow through the condenser 93 to dissipate heat from the condenser 93, and the outside air passes through the condenser 93. At the same time, when the device is running, the motor 31 drives the second screw 32 to rotate, thereby driving the meshing plate 33 to move rightward, moving the soft brush 34 to the right side of the housing 1 and then stopping. During the movement of the soft brush 34, the screw 2 32 drives the transmission wheel 24 to rotate through the steering bevel gear set 35, and then drives the screw 1 23 to rotate through the transmission belt 25, so that the moving plate 26 meshed on the surface of the screw 1 23 moves upward. During the upward movement of the moving plate 26, air is drawn into the fixed box 21 through the one-way air inlet pipe 65; When the device is shut down, the fan 91 stops working, and at the same time, the motor 31 is started to reverse, and the soft brush 34 is pulled back to the left side through the reverse movement of the screw rod 32. During the process of the soft brush 34 moving to the left, the dust on the surface of the condenser 93 can be wiped off through the contact between the soft brush 34 and the condenser 93. The reverse rotation of the screw rod 32 will also drive the screw rod 23 to rotate in the opposite direction, thereby driving the movable plate 26 to move downward. When the movable plate 26 moves downward, the air under the movable plate 26 can be sent out through the one-way air outlet pipe 63, and a negative pressure is formed above the movable plate 26, thereby opening the closing component 5 and allowing the exhaust pipe 43 to intake air. During the process of the exhaust pipe 43 intake air, the wiped-off dust can be sucked into the fixed box 21. The gas entering the one-way air outlet pipe 63 will enter the air box 61. If the fixing bolts of the mounting frame 94 are loose, the gas entering the air box 61 can push the moving shaft 62 to move, thereby driving the gear ring 1 74 to rotate, driving the hexagon socket 73 and the fixing bolts in the hexagon socket 73 to rotate and retighten. When the fastening bolts are tightened, the hexagon socket 73 cannot continue to rotate. At this time, the rack 1 64 is stuck by the gear ring 1 74 and cannot move. As air continues to enter the air box 61, when the pressure in the air box 61 reaches the opening pressure of the pressure relief valve 66, the pressure is directly released through the pressure relief valve 66. If the fixing bolts of the mounting bracket 94 are not loosened, the rack 64 will be directly stuck by the gear ring 74 and cannot move, and air will continuously enter the air box 61. When the pressure in the air box 61 reaches the opening pressure of the pressure relief valve 66, the pressure is directly released through the pressure relief valve 66. When it rains, start the cylinder 81, which drives the rack 2 82 to rotate. The meshing of the rack 2 82 and the gear ring 2 83 drives the gear ring 2 83 to rotate, and then the rotating tube 42 rotates, so that the rotating tube 42 drives the closing plate 85 to rotate toward the protective net 86 through the exhaust pipe 43, so that the closing plate 85 covers the mesh of the protective net 86 to block the protective net 86 and prevent rainwater from entering the casing 1. When the rack 2 82 moves, the bottom end of the auxiliary air inlet pipe 87 can be pushed open, so that the bottom end of the auxiliary air inlet pipe 87 rotates outward and extends, and air is sucked into the device through the air inlet at the bottom of the auxiliary air inlet pipe 87.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rooftop machine with a protective structure, comprising a housing (1), characterized in that: A conveying assembly (2) is fixedly mounted at the bottom end of the inner cavity of the casing (1), a cleaning assembly (3) and an exhaust assembly (4) are provided in the middle of the inner cavity of the casing (1), and a closing assembly (5) is provided in the inner cavity of the conveying assembly (2); The conveying assembly (2) comprises a fixed box (21), the fixed box (21) being fixedly mounted at the bottom end of the inner cavity of the casing (1), a connecting pipe (22) and an exhaust pipe (27) being fixedly mounted at the top end of the fixed box (21), a screw rod (23) being rotatably connected to the inner cavity of the fixed box (21), and a movable plate (26) being meshed on the surface of the screw rod (23); The cleaning assembly (3) comprises a motor (31), the motor (31) being fixedly mounted on the front side of the middle of the inner cavity of the housing (1), the output shaft of the motor (31) being fixedly sleeved with a second screw (32), the surface of the second screw (32) being meshed with a meshing plate (33), the top end of the meshing plate (33) being fixedly mounted with a soft brush (34), and the end of the second screw (32) close to the fixing box (21) being provided with a steering bevel gear set (35).

2. The rooftop machine with a protective structure according to claim 1, characterized in that: The conveying assembly (2) further comprises a transmission wheel (24) and a transmission belt (25); the transmission wheel (24) is fixedly mounted on the steering bevel gear set (35) and the bottom end of the screw rod (23); the transmission belt (25) is transmission-connected to the surface of the transmission wheel (24); and the bottom end of the exhaust pipe (27) passes through the bottom of the casing (1).

3. The rooftop machine with a protective structure according to claim 1, characterized in that: The air extraction assembly (4) comprises a fixed tube (41), the fixed tube (41) being fixedly mounted on the front side of the middle part of the inner cavity of the housing (1), a rotating tube (42) being provided at the top end of the fixed tube (41), and an air extraction tube (43) being fixedly mounted on the rear side of the rotating tube (42).

4. The rooftop machine with a protective structure according to claim 3, characterized in that: The soft brush (34) is located at the rear side of the air extraction pipe (43), and the fixed pipe (41) has no contact with the motor (31) and the meshing plate (33).

5. The rooftop machine with a protective structure according to claim 1, characterized in that: The closing assembly (5) comprises a closing plate (51), the closing plate (51) being rotatably connected to the top end of the inner cavity of the fixing box (21), an extension plate (52) being fixedly mounted on the bottom end of the closing plate (51), a return spring (53) being fixedly mounted between the extension plate (52) and the front side wall of the inner cavity of the connecting pipe (22), the closing plate (51) being located below the connecting pipe (22), and the exhaust pipe (27) being located on a side of the connecting pipe (22) close to the motor (31).

6. The rooftop machine with a protective structure according to claim 1, characterized in that: The casing (1) is provided with original machine accessories (9), the original machine accessories (9) comprising a fan (91), a rain cover (92), a condenser (93) and a mounting frame (94), the fan (91) and the rain cover (92) are both fixedly mounted on the top of the casing (1), the fan (91) is located inside the rain cover (92), the condenser (93) is fixedly mounted in the inner cavity of the casing (1), and the mounting frame (94) is fixedly mounted on the bottom of the casing (1).

7. The rooftop machine with a protective structure according to claim 6, characterized in that: A fastening assembly (6) is fixedly mounted on the bottom end of the mounting frame (94), the fastening assembly (6) comprising an air box (61), the inner cavity of the air box (61) being movably connected to a movable shaft (62), an end of the movable shaft (62) extending out of the air box (61) being fixedly mounted with a rack (64), an end of the air box (61) away from the air box (61) being fixedly mounted with a one-way air outlet pipe (63) and a pressure relief valve (66), and a top end of the movable plate (26) being fixedly mounted with a one-way air inlet pipe (65).

8. The rooftop machine with a protective structure according to claim 7, characterized in that: The top end of the one-way air outlet pipe (63) passes through the bottom of the housing (1) and is fixedly mounted on the bottom end of the inner cavity of the fixing box (21); the bottom end of the one-way air inlet pipe (65) does not contact the housing (1); and the pressure relief valve (66) is located on a side of the one-way air outlet pipe (63) away from the housing (1).

9. The rooftop machine with a protective structure according to claim 7, characterized in that: A rotating assembly (7) is fixedly mounted on the bottom end of the housing (1), the rotating assembly (7) comprising a fixed plate (71), a telescopic rod (72) is fixedly mounted on the bottom end of the fixed plate (71), a hexagon socket (73) is rotatably connected to the bottom end of the telescopic rod (72), a gear ring (74) is fixedly mounted on the outside of the bottom end of the hexagon socket (73), and the gear ring (74) is meshed with a rack (64).

10. The rooftop machine with a protective structure according to claim 4, characterized in that: A shielding assembly (8) is provided in the middle of the casing (1), the shielding assembly (8) comprising a cylinder (81), the cylinder (81) being fixedly mounted on the left side of the inner wall of the casing (1), the output end of the cylinder (81) being fixedly sleeved with a second rack (82), the bottom end of the rotating tube (42) being fixedly mounted with a second gear ring (83), the bottom end of the second gear ring (83) being fixedly mounted with a connecting ring (84), the connecting ring (84) being rotatably connected to the top end of the fixed tube (41), the right side of the exhaust pipe (43) being fixedly mounted with a closing plate (85), the front side of the casing (1) being fixedly mounted with a protective net (86), the right side of the casing (1) being rotatably connected with an auxiliary air intake pipe (87), the bottom end of the auxiliary air intake pipe (87) being in contact with the second rack (82).

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